Htlaew ANBAI SAF-INSTANT YEAST RED LABEL SINGLE 1 lb (16oz) PACKAGE

My yeast package was hot when I took it from my mailbox. Is this whole package ruined?

Does frozen yeast have to be room temperature before use?

Can this be used in bread machine?

I had this 19 months, stored in fridge in a jar. I use regularly but it seems my doughs have trouble rising in recent months. How long does it last?